Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface showing a new design, shown in a first embodiment; and,

FIG. 2 is another front view thereof, shown in a second embodiment.

The perimeters of the portion of the underlying portion of a display screen and the graphical user interface are understood to be flush. The broken lines shown in the drawings illustrate portions of the display screen with a graphical user interface that form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 